http://en.wikipedia.org/wiki/Ludwig_Ritter_von_Köchel
_ Wolfgang Amadeus Mozart (1756-1791) Piano Sonata No.3, K.281
https://youtu.be/xpzedrGH5Gk
_ Barenboim Play Mozart Sonata D Major K. 311(complete)
https://youtu.be/roU3Qv5FdaE
_ Barenboim Play Mozart Sonate C Major (complete) K. 309
https://youtu.be/wUPYIcAu1QI
